<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="demo03.css">
</head>
<body>
    <p class="eat">吃饭</p>
     <p class="sleep">睡觉</p> 
     <p class="learn">学习</p> 
     <p class="read book">阅读 </p>
    
</body>
</html>